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Preparation method of composite ceramic filter element loaded with photocatalyst coating

A technology of composite ceramics and photocatalysts, which is applied in the field of water purification, can solve the problems of difficult separation of photocatalysts, difficulty in recycling, and insufficient contact, and achieve the effects of ensuring water safety, narrow particle distribution, and avoiding recycling problems

Inactive Publication Date: 2017-03-08
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since photocatalyst ions are loaded on a fixed carrier material, the separation of photocatalyst and water is simple, but the contact between fixed photocatalyst and water is not sufficient, so the purification efficiency is low
Suspended state is to dis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation method of the coating composite ceramic body used in each of the following embodiments comprises the following steps:

[0035] 1. Put 1000g of diatomite with an average particle size of 30μm, 300g of activated carbon powder with an average particle size of 15μm, 5g of water glass, 3g of nano-silver antibacterial agent, and 1.5L of deionized water into a ball mill jar, and seal the ball mill jar. Ball milling was performed at a speed of 80 rpm for 8 hours to obtain a dispersed first slurry.

[0036] 2. Open the above-mentioned ball mill tank, add 5g of carboxymethylcellulose sodium salt and 30g of calcium-based bentonite, and then continue ball milling at a speed of 80rpm for 3h to obtain the first stable flocculated slurry.

[0037] 3. Let the first part of the flocculation slurry stand for 12 hours to ripen, then pour it into the plaster mold, let it stand for 15 minutes, then turn the plaster mold over and pour out the remaining slurry; keep the mold u...

Embodiment 1

[0042] (1) Dissolve 20 g of butyl titanate with a purity greater than 98% in 1 L of ethanol to obtain a butyl titanate solution, slowly drop 1 L of aqueous ethanol solution with a concentration of 99% into the above-mentioned butyl titanate solution, stir and mix the reaction 3h, the stirring speed is 500~3000rpm;

[0043] (2) filter the material obtained in step (1) with filter paper to obtain a filter cake, and use ethanol and deionized water to clean 3 times at intervals to remove impurities;

[0044] (3) re-dissolving the material obtained in step (2) in 1L of deionized water to obtain a solution;

[0045] (4) add 5mL nitric acid in the solution of step (3) gained and carry out acidolysis;

[0046] (5) Add the deionized aqueous solution of 50mL 2%PVA in the material of step (4) gained, make stable nano titania sol;

[0047] (6) Pour the above-mentioned nano titanium dioxide sol into the cavity of the above-mentioned coating composite ceramic body and dip for 30s, pour ou...

Embodiment 2

[0051] (1) Dissolve 80 g of butyl titanate with a purity greater than 98% in 1 L of ethanol to obtain a butyl titanate solution, slowly drop 2 L of aqueous ethanol solution with a concentration of 96% into the above-mentioned butyl titanate solution, stir and mix the reaction 5h, the stirring speed is 500~3000rpm;

[0052] (2) filter the material obtained in step (1) with filter paper to obtain a filter cake, and wash with ethanol for 4 times to remove impurities;

[0053] (3) re-dissolving the material obtained in step (2) in 1L of deionized water to obtain a solution;

[0054] (4) add 20mL nitric acid in the solution of step (3) gained and carry out acidolysis;

[0055] (5) Add the deionized aqueous solution of 80mL 1.5%PVA in the material of step (4) gained, make stable nano titania sol;

[0056] (6) Pour the above-mentioned nano titanium dioxide sol into the cavity of the above-mentioned coating composite ceramic body and dip for 120s, pour out the excess titanium dioxid...

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Abstract

The invention discloses a preparation method of a composite ceramic filter element loaded with a photocatalyst coating. The preparation method comprises the following steps: (1) preparing butyl titanate of which the purity is greater than 98% into a butyl titanate solution, adding an ethanol aqueous solution in the butyl titanate solution, and fully stirring and mixing to react; (2) filtering the material obtained from the step (1) to obtain a filter cake and removing impurities; (3) re-preparing the material obtained from the step (2) into a solution; (4) adding acid in the solution obtained from the step (3) to carry out acid hydrolysis; (5) adding a thickening agent in a material obtained from the step (4) to prepare stable nano titanium dioxide sol; (6) uniformly loading the nano titanium dioxide sol on the inner wall surface of a coated composite ceramic blank in a dipping manner, and drying to obtain a dry green body; and (7) insulating and sintering the dry green body under the protection of inert gas or nitrogen to obtain the composite ceramic filter element loaded with the photocatalyst coating. The composite ceramic filter element loaded with the photocatalyst coating has good photo-catalysis capability, is used with an ultraviolet lamp, and can kill bacterial and organic matters; COD content of yielded water is reduced effectively; and safety of the yielded water is guaranteed.

Description

technical field [0001] The invention relates to the technical field of water purification, and specifically relates to a method for preparing a composite ceramic filter element loaded with a photocatalyst coating. Background technique [0002] Pollutants in drinking water mainly include bacteria (such as Escherichia coli), organic matter (such as chlorinated hydrocarbons, benzene compounds) and heavy metal ions (such as lead, cadmium). During the sterilization process of the tap water we use daily, some organic matter and free chlorine combine to form carcinogenic organic chlorides (such as chloroform). In addition, microorganisms in the pipeline will reproduce again, which affects the quality of the water. Therefore, it is generally necessary to Drinkable after further purification. The water suitable for human drinking is not as pure as possible. Trace elements play a vital role in the development of human bones, nervous system, and metabolic system, and these trace eleme...

Claims

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Application Information

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IPC IPC(8): B01D39/14
CPCB01D39/14B01D2239/0471B01D2239/10
Inventor 洪昱斌陈金发陈云强蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN